OrbitStabilizer
OrbitStabilizer is a term used in orbital mechanics and control theory to describe a modular onboard system designed to keep a spacecraft in a desired orbit by actively counteracting perturbations. It combines state estimation, trajectory control, and propulsion command generation to minimize deviations in orbital elements such as semi-major axis, eccentricity, and inclination.
The system typically relies on a state estimator, often an extended or unscented Kalman filter, fusing measurements
Common control strategies include linear quadratic regulators, PID controllers, and model predictive control, sometimes with constraints
Applications include satellite constellation maintenance, debris avoidance maneuvers, and station-keeping for GEO, LEO, or transfer orbits.
Limitations include dependence on accurate models and sensors, fuel budget, actuator saturation, and communication delays. In